Can't say it was a glitch just like one can't verify if that is true or not. Unless Oasis came out themselves and said it "_____ was patched to adjust for fragment rates..." which they HAVE NEVER, nor WILL EVER do.

From personal experience, I have noticed Itachi Fragments from Edo Treasures are more frequent than Kage or others. I can't verify this at the moment now, but if you are interested in star'ing up ninjas from there, it couldn't hurt. If you have yet to go for super rares in Kage Treasures OR are interested in endgame with them (skillbreaks), I would recommend pulling from there over edo treasure. It really is just personal preference.

What I can verify is that based on my own collected data, the frequency rate in which I got Edo Hashirama frags has been roughly 35.38 per frag. This is over a 2300 pull period and also includes the variable rate of 2 or 1 per get. I would imagine that his rate is similar to that of itachi frequency as well. So just go by a rough estimate of 40 per frag. Out of 120 scrolls, you will pull him twice, and the average is a 2 and a 1, thus we arrive at a 40 per scroll determination.

So in pulling with 120 scrolls, the results will be one of the following:

1 and 1

1 and 2

2 and 1

2 and 2

You are more likely to get an average of 40 per scroll. Simple probability.

I have just recently gotten my second super rare last week, at roughly 2300 pulls. I'm currently sitting on 65/80 for edo Hashirama. So that is a rate of about 35 pulls per fragment. For short term, its best to round up. Luck will also play a varience into the end results, but over time, the luck tends to even out. I estimate I will have finished my hashi in 560 more pulls at most. Sitting on 200 seal scrolls at the moment....so almost there. :)